Crenoicus harrisoni is currently only known to inhabit a spring flowing into Saxby’s Swamp in the Barrington Tops wilderness area, where it lives among the roots of mosses and other plants. Detailed surveys of aquatic crustaceans in the Mt Royal and Barrington Tops region have not found any examples of the species outside this site.
Crenoicus harrisoni is listed as a protected species in NSW under the Fisheries Management Act 1994. Heavy penalties apply for taking or possessing them.
Crenoicus harrisoni is a small, aquatic isopod crustacean measuring 9–10 mm in length. It is grey and brown with light-coloured legs. Both adults and young are blind, cannot swim and are generally slow moving, especially during the cold season. They have bright white patches on their head where their eyes should be.
Crenoicus harrisoni are relatively abundant in the particular spring where they occur, reaching densities of approximately 10–100 per square metre.
Taking or possessing Crenoicus harrisoni is an offence and heavy penalties apply. For corporations these penalties can include fines of up to $55 000 while individuals can face fines of up to $11 000 and up to 3 months in prison.
Adlem LT 1996, ‘Biogeography of the freshwater Peracarida (Crustacea) from Barrington Tops, NSW’, Bachelor of Science unpublished Honours Thesis, Dept of Geography, University of Newcastle, 97 pp.
Chilton C 1917, ‘Some Amphipoda and Isopoda from Barrington Tops (4600 ft alt.) NSW’, Journal of Proceedings of the Royal Society of New South Wales, 50, 82–98.
Nicholls GE 1944, ‘The Phreatoicoidea. Part II. The Phreatoicoidae’, Papers and Proceedings of the Royal Society of Tasmania 1943, 1–156.
Sayce OA 1900, ‘Phreatoicus shephardi—a new species of fresh-water Isopoda from Victoria’, Proceedings of the Royal Society of Victoria, n.s. 13, 25–8. (pl. 3).
Wilson GDF & Ho EL 1996, ‘Crenoicus nicholls, 1944, (Crustacea, Isopoda, Phreatoicidea): Systematics and biology of a new species from New South Wales’, Records of the Australian Museum 48, 7–32.
For more information on general fishing regulations check with your local fisheries office or visit www.dpi.nsw.gov.au/fisheries
To contact your local NSW DPI Fisheries Office visit https://www.dpi.nsw.gov.au/contact-us/contact-a-dpi-fisheries-officer or phone 1300 550 474.